Stump-blasting tool



Patented Get. 28, 1924.

PATENT OFFICE.

SYIJVESTER WEYRIGK, OF NEWCASTLE, WASHINGTON.

STUMP-BLASTING TOOL.

Application filed February 18, 1922. Serial No. 537,590.

To all whom it may concern:

Be it known that SYLvEs'rER WEYRIOK, a citizen of the United States of America, residing at Newcastle, in the county of King and State of WVashington, has invented new and useful Improvements in Stump-Blasting Tools, of which the following is a specification.

The object of the invention is to provide a simple and eflicient tool for use in preparing stumps for the application of blast ing charges in the operation of clearing land, and particularly to provide a tool whereby the formation of pockets for the reception of blasting charges may be facilitated under conditions insuring the compact location of the charge in the most favorable position for effecting the desired result as a means of economizing in the consumption of the blasting powder or like agency employed in this connection; and with this object in View the invention consists in a construction and combination of parts of which a preferred embodiment is shown in the accompanying drawings, wherein Figure 1 is a side view, and

Figure 2 is a face View of a tool embodying the invention.

Figure 3 is a cross sectional view 011 the plane indicated by the line 33 of Figure 2.

Figure 4 is a detail sectional View of the point head of the tool.

The device consists essentially of a shank 10 which is provided at one end with a point head 11 and at the other end With a spoon head 12, the shank proper preferably being of tubular construction as a means of insuring the maximum strength with a given weight of the object, and as a further means of facilitating the formation of the spoon head which is preferably flattened to afford the convenience of a shovel in digging out the loose fibre, rotten structure, earth, etc., necessary to provide a pocket suitable for the reception of a blasting charge.

The spoon head 12, it will be noted, is laterally expanded, the contour following a gradual curve, the free extremity rounded. Also it is deflected from the line of the shank. so as to be disposed in obstructing relation to the bore of the latter. In placmg a charge, the deflection of the spoon head precludes the charge sliding out of the shank until the tool is in a position for such discharge when the end containing the point head may be elevated to eject the charge. The latter expansion of the spoon head precludes the maln'ng of a hole with the latter of greater diameter than the shank so there may be no interference from the latter in the digging operation.

The point head is preferably solid and is reduced at 13 to fit into the end of the tubular shank Where it may be brazed or otherwise secured to afford a rigid structure. In forming small pockets obviously the pointed head may be employed as a punch but in the removal of large stumps it is usually necessary to prepare for the charge for excavating at a suitable point a considerable portion of material toform a cavity sufiicient to hold a charge of the required size in a compact body so that the explosion thereof may be abrupt and uniform, rather than progressive or gradual as when the blasting powder is arranged in a train extending through a considerable length of channel. The spoon formation of one of the heads also facilitates the placing of the blasting material in the proper position and saves the material by avoiding scattering thereof as in the ordinary practice where special tools are not available and the Workman must rely upon make-shift means and usually relies upon a pick or a tool handle as a means of preparing a seat for the charge.

Having described the invention, what is claimed as new and useful is A tool for the purpose indicated having ture,

SYLVESTEB WEYRIGK. 

